package com.hwz.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.hwz.constant.MessageConstant;
import com.hwz.context.BaseContext;
import com.hwz.dto.*;
import com.hwz.entity.*;
import com.hwz.exception.AddressBookBusinessException;
import com.hwz.exception.OrderBusinessException;
import com.hwz.exception.ShoppingCartBusinessException;
import com.hwz.mapper.*;
import com.hwz.result.PageResult;
import com.hwz.service.AddressBookService;
import com.hwz.service.OrderService;
import com.hwz.utils.HttpClientUtil;
import com.hwz.utils.WeChatPayUtil;
import com.hwz.vo.OrderPaymentVO;
import com.hwz.vo.OrderStatisticsVO;
import com.hwz.vo.OrderSubmitVO;
import com.hwz.vo.OrderVO;
import com.hwz.webSocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * [一句话描述该类的功能]
 *
 * @author : [Lenovo]
 * @version : [v1.0]
 * @createTime : [2024/3/21 19:00]
 */
@Service
@Slf4j
public class  OrderServiceImpl implements OrderService {
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    @Value("${hwz.shop.address}")
    private String shopAddress;

    @Value("${hwz.baidu.ak}")
    private String ak;
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //异常情况的处理（收货地址为空、超出配送范围、购物车为空）
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null)
        {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        checkOutOfRange(addressBook.getCityName()+addressBook.getDistrictName()+addressBook.getDetail());
        //查询当前用户的购物车数据
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.selectList(shoppingCart);

        if (shoppingCarts == null || shoppingCarts.size() == 0)
        {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        //向订单表插入1条数据
        orderMapper.insert(order);
        List<OrderDetail> orderDetails =new ArrayList<>();
        for (ShoppingCart shoppingCart0:shoppingCarts) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(shoppingCart0, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetails.add(orderDetail);
        }
        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetails);

        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);

        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "捍胃者外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单号查询当前用户的订单
        Orders ordersDB = orderMapper.getByNumberAndUserId(outTradeNo, userId);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);
        //////////////////////////////////////////////
        Map map = new HashMap();
        map.put("type", 1);//消息类型，1表示来单提醒
        map.put("orderId", orders.getId());
        map.put("content", "订单号：" + outTradeNo);

        //通过WebSocket实现来单提醒，向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
        ///////////////////////////////////////////////////
    }

    @Override
    public void cancelOrder(OrdersCancelDTO ordersCancelDTO) throws Exception {
        Long userId = BaseContext.getCurrentId();
        // 查询订单
        Orders ordersDB = orderMapper.getByIdAndUserId(ordersCancelDTO.getId(),userId);
        // 判断订单状态
        if (ordersDB.getPayStatus() == Orders.PAID) {
            String refund =weChatPayUtil.refund(
                    ordersDB.getNumber(),
                    ordersDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            log.info("申请退款：{}", refund);
        }
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    @Override
    public OrderStatisticsVO statisticsOrder() {
        //待接单数量
        Integer toBeConfirmed = orderMapper.statisticsOrder(Orders.TO_BE_CONFIRMED);
        //待派送数量
        Integer confirmed = orderMapper.statisticsOrder(Orders.CONFIRMED);
        //派送中数量
        Integer deliveryInProgress = orderMapper.statisticsOrder(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    @Override
    public void completeOrder(Long orderId) {
        //完成订单其实就是将订单状态修改为“已完成”
        //只有状态为“派送中”的订单可以执行订单完成操作
        Orders orders = orderMapper.getById(orderId);
        if (orders!=null &&orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS))
        {
            orders.setStatus(Orders.COMPLETED);
            orders.setDeliveryTime(LocalDateTime.now());
            orderMapper.update(orders);
        }else {
            throw  new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    @Override
    public void rejectionOrder(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
//        - 商家拒单其实就是将订单状态修改为“已取消”
         Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
//        - 只有订单处于“待接单”状态时可以执行拒单操作
        //          商家拒单时需要指定拒单原因
//          商家拒单时，如果用户已经完成了支付，需要为用户退款
        if (orders!=null && orders.getStatus().equals(Orders.TO_BE_CONFIRMED))
        {
            if(orders.getPayStatus() == Orders.PAID)
            {
                String refund =weChatPayUtil.refund(
                        orders.getNumber(),
                        orders.getNumber(),
                        new BigDecimal(0.01),
                        new BigDecimal(0.01)
                );
                log.info("退款结果:{}",refund);
            }else {
                orders.setStatus(Orders.CANCELLED);
                orders.setCancelTime(LocalDateTime.now());
                orderMapper.update(orders);
            }
        }else {
            throw  new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    @Override
    public void confirmOrder(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders =Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public OrderVO getOrderDetails(Long orderId) {
        Orders orders = orderMapper.getById(orderId);

        // 查询订单详情
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    @Override
    public void deliveryOrder(Long orderId) {
//        - 派送订单其实就是将订单状态修改为“派送中”
//        - 只有状态为“待派送”的订单可以执行派送订单操作
        Orders orders = orderMapper.getById(orderId);
        if (orders != null &&orders.getStatus().equals(Orders.CONFIRMED))
        {
            orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
            orderMapper.update(orders);
        }else {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
    }

    @Override
    public PageResult historyOrders(Integer page, Integer pageSize, Integer status) {
        PageHelper.startPage(page, pageSize);
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> orderVOList = new ArrayList<>();
        if (ordersPage != null && ordersPage.getTotal() > 0)
        {
            for (Orders orders : ordersPage)
            {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
                orderVO.setOrderDetailList(orderDetailList);
                orderVOList.add(orderVO);
            }
        }
        return new PageResult(ordersPage.getTotal(), orderVOList);
    }

    @Override
    public void userCancelOrder(Long orderId) throws Exception {
//        - 待支付和待接单状态下，用户可直接取消订单
//                - 商家已接单状态下，用户取消订单需电话沟通商家
//                - 派送中状态下，用户取消订单需电话沟通商家
//                - 如果在待接单状态下取消订单，需要给用户退款
//                - 取消订单后需要将订单状态修改为“已取消”

        Orders orders = orderMapper.getById(orderId);
        if (orders == null)
        {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        if (orders.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED))
        {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    @Override
    public void repetitionOrder(Long orderId) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }
/*
- 输入订单号/手机号进行搜索，支持模糊搜索
- 根据订单状态进行筛选
- 下单时间进行时间筛选
- 搜索内容为空，提示未找到相关订单
- 搜索结果页，展示包含搜索关键词的内容
- 分页展示搜索到的订单数据
 */

    /**
     * 根据订单号/手机号进行搜索，支持模糊搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> ordersPage = orderMapper.pageQuery(ordersPageQueryDTO);
        if (ordersPage == null || ordersPage.getTotal() == 0)
        {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(ordersPage);

        return new PageResult(ordersPage.getTotal(), orderVOList);
    }

    private  List<OrderVO> getOrderVOList(Page<Orders> ordersPage) {
        List<OrderVO> orderVOList = new ArrayList<>();
        for (Orders orders : ordersPage) {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(orders, orderVO);
            String orderDishes = getOrderDishesStr(orders);
            // 查询订单菜品信息
            List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
            orderVO.setOrderDetailList(orderDetailList);
            orderVOList.add(orderVO);
        }
        return orderVOList;
    }

    private String getOrderDishesStr(Orders orders) {

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if(!jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if(distance > 5000){
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    @Override
    public void reminderOrder(Long orderId) {
        Orders orders = orderMapper.getById(orderId);
        if (orders != null)
        {
            //////////////////////////////////////////////
            Map map = new HashMap();
            map.put("type", 1);//消息类型，1表示来单提醒
            map.put("orderId", orderId);
            map.put("content", "订单号：" + orders.getNumber());

            //通过WebSocket实现来单提醒，向客户端浏览器推送消息
            webSocketServer.sendToAllClient(JSON.toJSONString(map));
            ///////////////////////////////////////////////////
        }else {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
    }
}
